Operation of the Conowingo Hydroelectric Plant
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Large run-of-river hydroelectric (or “hydro”) developments on rivers with extremely wide variations in flow can only be justified on a sound economic basis provided such plants can be operated in conjunction with a large steam generating system so as to attain the greatest possible economic use of the hydroelectric power. By reducing the steam generating costs to a minimum, over-all economies can be effected to ∼aximum advantage for the entire system. Allocation of hydroelectric energy to the best advantage requires determinative river flow forecasting, proper use of pondage, maintenance of head, and station efficiency so that maximum capacity and maximum energy can be obtained from the available water to replace the most expensive steam generation. This paper presents in detail the methods by which the various factors are analyzed to determine the most effective operation sequences for a large hydroelectric installation.Keywords:
Hydroelectricity
A Scheme for retrofitting the primary air's isolation valves at coal mill's entrance of Huaneng Fuzhou Power Plant's sets No.3 and No.4 by exchanging them for gate valves, to obliterate their leakage, problem, is being put forth. Three ways for installing the gate valves are compared at the same time.
Retrofitting
Gate valve
Installation
Leakage (economics)
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A recent water crisis that befell over several states in Brazil negatively affected hydroelectric plants energy production once rainfall regime exerts a major influence in predominantly hydraulic power systems. This paper analyses the correlation between power generation and data collected from tributary flow, reservoir level, standardized precipitation index (SPI) on hydroelectric plants located in the Sao Francisco river basin. The analysis is performed by Pearsons Coefficient of Correlation, for a period of 28 years that includes the dry season, and for the dry season separately. The results showed weak and moderate correlation coefficients between SPI and generation for both analyzed periods with slightly higher correlations in the last years when a decrease in power generation is observed. The correlations found between the affluent flow, reservoir level, and the generation were influenced by the reservoir characteristics, and were slightly higher than those of the dry periods.
Hydroelectricity
Dry season
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Hydroelectricity
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This paper introduces the standard selection of field bus control technology and its main advantages in power plant process control. It also comes up with the system configurations, technique-capital analysis, possible problems and preventive measures for Huaneng Yuhuan Power Plant BOP(Plant Balance of Plant) System , aimed at promoting the field bus control application as well enhancing automation in power plant process control.
Profibus
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The general information of construction organizing design of Huaneng Yuhuan Power Plant 1 000 MW unit and characteristic technical schemes in the construction process are introduced including personal and machinery arrangement,general construction layout,quality control and technical issues,etc.,which is a reference for construction and management designers of million kW units.
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Abstract—Hydroelectric power, one of the most important
sources of mass generation of electric power, is a renewable
source of energy. The amount of electricity that can be
produced by a hydro-electricity generating system depends on
systemic variables viz; plant efficiency, volumetric water flow
through the turbine and the head of the water from the water
surface to the turbine. The availability of the Water in the
reservoir is a function of some hydrological variables principal
among which are rainfall, reservoir inflows and evaporation.
Understanding the dynamics of these variables, and the
correlation between them are core to proper planning and
management of a hydroelectric power station. In this Study,
simple mathematical methods that include linear programming
and statistical analysis based on simulation techniques were
used to evaluate vital parameters based on the hydrologic data
obtained from the Hydrologic Units of the Shiroro Power
Stations in Nigeria. The overall aim of the study is to idealize
power generation at Shiroro dam in and out of rain season so
as to ensure optimum generation of electricity all year round in order
to achieve energy sufficiency in Nigeria.
Hydroelectricity
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A series of innovation and optimization measures were taken for the steam turbines,boiler and environmental protection equipment,coal ash system,electrical instrumentation,civil engineering,main plant building layout and general layout of two 1 000 MW units in Huaneng Haimen Power Plant,thus effectively raising unit efficiency,reducing project and operation costs on the basis of ensuring safe operation of units.
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Many of Iran's steam power plants are old and inefficient. Repowering as an experimented and generable way can be an effective method for reconstruction of the old steam power plants. According to the power plant specifications, there are different repowering methods. In this paper, overall conditions have been considered for choosing the most appropriate method. Thermo-economical parameters are calculated for repowering a number of Iran power plants. Expenses for repowering an existing power plant are compared with those of establishing a new gas turbine plant or a combined power plant cycles. The cost of electricity generation are calculated and compared for three different scenarios: repowering of the steam power plant, building a new gas turbine power plant and building a combined cycle power plant. The results show that repowering options not only have considerable capacity for upgrading, but also provide the lowest cost of electricity generation.
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Rolls-Royce has joined forces with Foster Wheeler to offer a modern power plant that integrates the benefits of coal gasification with the efficiency advantages of combined-cycle power generation. Powered by fuel gas from two parallel Lurgi slagging gasifiers, the 150-MW power station employs two Rolls-Royce SK60 gas-turbine generating sets. The proposed plant is designed for continuous power generation and should operate efficiently down to one-third of its rated capacity. Rolls estimates that the installed cost for this station would be lower than that for a conventional coal-fired station of the same output with comparable operating costs. Cooling water requirements would be less than half those of a coal-fired station.
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Abstract The main goal of this study is to forecast total electricity and hydroelectricity energy generation using historical electricity energy production data in order to determine the future level of electricity and hydroelectricity energy generation in Turkey. For this purpose, Turkey's electricity energy sector was reviewed during the period of 1940–2005. The total electricity and hydroelectricity energy generation were then modelled using historical energy generation data as years with regression analysis. Additionally, the portion that hydroelectric energy generation of Turkey has within total electricity energy production and probable meeting capacity of Turkey's hydroelectric potential of its future total demand was determined. According to the results, it is deduced that hydropower energy will have portion of 13.6% within the total electricity energy generation in 2030. In addition, it is concluded that the whole of Turkey's technical and economical hydroelectric energy potential that is equal 129.9 billion kWh will be used in the year of 2102 if the current trend continues.
Hydroelectricity
Electric potential energy
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